C++ std::wofstream 类输出中内容到文件中失败

Question

求一个使用 wofstream 输出中文到文件的例子
C++ std::wofstream 类输出中内容到文件中失败，代码如下：

int main() {
    fs::path currentPath =   "D:\\XXX\\DDD\\a.txt";
    //===================
    std::vector<std::wstring> vec;
    vec.push_back(L"1中");
    vec.push_back(L"2中");
    vec.push_back(L"3中");
    std::wofstream ofs(currentPath);
    auto it = vec.begin();
    while (it != vec.end()) {
        ofs << *it;
        it++;
    }
    ofs.close();
    return 0;
}

Answer 1

基于Monster 组和GPT的调写：

#include <iostream>
#include <fstream>
#include <locale>
#include <codecvt>
#include <vector>
#include <filesystem>

int main() {
    std::vector<std::wstring> vec = {L"1中", L"2中", L"3中"};
    std::filesystem::path currentPath = "D:\\XXX\\DDD\\a.txt";
    
    std::wofstream ofs(currentPath);
    if (ofs.is_open()) {
        std::locale utf8_locale(std::locale(), new std::codecvt_utf8<wchar_t>);
        ofs.imbue(utf8_locale);  // 设置输出流的编码为 UTF-8
        
        for (const auto& s : vec) {
            ofs << s << std::endl;
        }
        
        ofs.close();
        std::cout << "写入完成" << std::endl;
    }
    else {
        std::cout << "无法打开文件" << std::endl;
    }
    
    return 0;
}